Monolithic reenforcement



NOVQ 28, 1933. G GREUUCH 1,937,018

MONOLITHIC REENFORCEMENT Filed May 25, 1931 2 Sheets-Sheet l Patented Nov. 28, 1933 9 i V I 37,018 i MONOLITHIC REENFOROEMENT Gerald G. Greulich, ClevelandHeights, Ohio, as-

Signor to The Lock-Steel Company, Pittsburgh, it 2a., a corporation of Delaware. I Application May 25, 1931. Serial No. 539,651.

. v 6 fll K 27 v; j 1, f g This invention relates'to wall,'floor, or ceiling with a concrete wall 19, but it is tobeunderstood I construction, and more particularly to means for that it is intended for use in connectionwith the reeniorcing and rendering burglar-proof 'the reenforcement'of a ceiling,-or'floor, as well. The floors, walls and'ceilings of bank vaults. In orreenforcement is preferably in the form of units der to increase the difficulty-of breaking through v which are adapted to be-handled individually 'and'ec'. 1i

walls of a bank vault, it-is desirable to use hardthen interlocked at the time of installation. ened tool resisting steelfor the reenforcing matei the preferred form, each unit comprises a pair of" i rial so as to require the'use of a torch to cutaway longitudinally extending members 11 and 12, the metal. Where the reenforcement is iabriwhich are interconnected by vshaped -cross 'or lo cated by processes which include bending, crimptransverse niembers13. The endsof-"the cross ing or expanding, it is impossible to utilize hardmembers may be bent asat 14,1'to embrace the. ened tool steel throughout for suchmetal cannot end members'andare preferably welded to the'end be subjected to such operations. Furthermore, members at th'e factory. "In addition, the-cross I themanner of imbedding the metal in the conmembersmayf be staggered, as is' shown in Fig.--3,. 5 crete, has in many cases been unsatisfactory for so that the apexof one extends on one side of th'e it has been a comparatively easy matter to chip plane of the,- longitudinal members, while the away the concrete and then strip large sections apex of the adjace t one te ds n the pp from the wall. Again, where the metal lacks sufside of such plane.

ficient structural strength, it has been compara- The units so fabricatedYcan be readily nested V 20 tively easy to demolishthe wall by an explosive for shipment either on a gon a, o a flat f force. and can be supplied in any desired length in An object of the present invention therefore, accordance with the dimensions of the vault to be is to provide a simple and effective reenforcement reenforoed- At the p a e of installation, h units that may be made entirely of tool resisting steel are placed in side by side relationship, and the 25 and that may be interlocked so as to require the cross members are interfitted and aligned.

metal to be cut into sections regardless of the Thereupon, interlocking; bars 15 are passed angle at which an attempt is made to pierce the through. the interfi portions w wall. Furthermore, the present invention is diunits are interlocked and the entire structure rected toward a reenforcement, which enables app i ates an artic t d un t. of great 30 the parts to be completely fabricated at the fac- St e y so shaping he cross members tory and compactly nested for shipment, and conthe longitudinal membersiare relativelyv close .toveniently handled at the time and place of ingethor a d als by Spacing the orossmemhors; stallation. An additional object of my invention re ative y Close together, i iS l i v that a is to providea slab reenforcement, which in addi pe u fi t in size'to admit aman can-.

35 tion to its tool resisting characteristics is capable not be made through the wall without cutting of increasing the resistance of the wall to demothe Stee t S a S ct for at I point a lition by explosive force and the load stresses inthe Ste be St pped i lay r extending either cident to the collapse of a building by fire or othtransversely or obliquely to thewall.

.erwise. In Figs. 5 to 8, I .have shown a modifica- 40 The preferredrform of carrying out my invention of my invention wherein the staggered cross i tion is shown in the drawings, wherein Fig. l is ba s a e p a d by diamond Shaped ba a horizontal section of the concrete wall embodyeach of which a formed from a Single bar that ing my reenforcing members; Fig. 2 is a vertical is bent intermediately to provide a l p 21 section taken on theline 2 2 of Fig. 1; Fig. 3 is through which one of the end b may be pass 45 a perspective view illustrating one of the units; The free ends of the bar 20 are then'benttoward Fig. 4 is a perspective view showing the intereach other" to p v d a D 22 through Which locking relationship of theunits; Fig. 5 is a horithe other end bar a be inserted- Between the zontal section of a concrete wall embodying a loops a d 22, each a is p rab y b to modification of my invention; Fig. 6'is a vertical p v oppositely p d P p n I 50. section taken on the line e s in Fig. 5; Fig. 7 is 23 and 24, whi h wh n fi t d p v d a i n d -1 a perspective'view illustrating the cross bars reopeni gs through which looking s y b moved from the end bars, and Fig. 8 is a perspecinserted. I I I tive View showing the interlocking relationship The construction which I have illustrated and of the units. described provides an interlockedreenforcement 55- My invention is shown in Fig. 1 in connection which resists stresses in every direction. This is apparent from an inspection of the drawings, wherein the end members or interlocking members are arranged in substantially parallel rows, while the cross members extend obliquely to the rows and thereby ofifer resistance to the method of piercing a wall by means of a Wedge shaped opening. A further advantage is that the entire reenforcement is interlocked so that in effect it constitutes a chain, which will add materially to the structural strength of the wall and prevent buckling in case of fire or explosion. A further valuable and practical advantage is the fact that the reenforcement may be fabricated with ordinary Welding equipment and that the arrangement and size of the parts may be selectively controlled and varied to suit any particular specification.

I claim: g 1. A reenforcement for a slab ofbuilding material, comprising a plurality of units each comprising end members and transverse members, some of the transverse members extending on one side of the plane of the end members and the remaining transverse members extending on the *opposite side of the plane, and all of the transverse members being rigidly connected to the end members. at spaced intervals.

2. A reenforcing unit vfor a slab of building material, comprising a pair of substantially parallel end bars and V-shaped cross bars rigidly 3. A reenforcement for building construction, comprising a unit having a pair of end bars and. transverse bars welded thereto and in staggered relationship with reference to the plane of the end bars, the offset of the transverse members on one side of the plane being substantially equal to the ofiset of those on the opposite side of said plane. I

4. A reenforcement for a slab of building material, comprising a unit having a pair of end bars, a plurality of cross members rigidly connected to the end bars, and being disposed in staggered relationship thereon, the cross bars being substantially similarly, formed and the offset of those on one sideof the plane of the end bars being substantially equal to the offset of those on g 5. A reenforcing unit for a slab of buildingmaterial, comprising a unit having a pair of endbars, and crossv bars connected tov the end'bars at spaced intervals thereon, the cross bars being placed on opposite sidesv of the plane of the end members to forma diamond.

6. A reenforcing for a slab of building materiaL cQmprising a pair of end bars andspaced cross bars, each cross bar being disposed in a L. plane normal to. the plane of the end bars, and

being formed of a sinfslStrip that isbent intermediately', and looped, around one of the bars,

and that has, the free ends engaging the other of said bars.

' GERALD G. GREULICH. 

